BIOS_101_Review_-_Exam_2 - BIOS 101 Review Exam 3 The exam...

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BIOS 101 Review – Exam 3 The exam will be based on material that was covered in lecture. While all material is fair game, you should concentrate on the following topics: Lecture 9 Circulation and Respiration What are the vessels of the closed human circulatory system and how do they differ? Arteries -carry blood away from the heart Veins - return the blood back to the heart Blood plasma that is forced out of capillary walls is referred to as what? Fluids? What are the three functions of the circulatory system? Transportation Regulation Protection What does the circulatory system transport? It transfers O2 to cells for aerobic respiration and C02 to the lungs for elimination. What are the three components of the human cardiovascular system? Heart -pump Blood vessels - network of tubes Blood -circulatory fluids How do arteries differ from arterioles? Arterioles are smaller in diameter -their surrounding layer can be relaxed to enlarge diameter Why do capillaries have thin walls? To allow diffusion to take place
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Describe how blood flows back to the heart with the aid of muscle contraction and uni- directional valves. 1. Low pressure in veins 2. Skeletal muscles 3. Unidirectional valves What is the purpose of the lymphatic system? To collect and recycle leaked fluids Returns proteins to circulation Transports fats absorbed from the intestine Aids in the body’s defense What are the components of blood plasma? 1. Metabolites and wastes -glucose, vitamins, hormones, and wastes 2. Salts and Ions -chief plasma ions: sodium, chloride, bicarbonate -Minor ion- calcium, magnesium, copper 3. Proteins -act as an osmotic counterforce -major protein is serum albumin -other proteins fibrinogen and antibodies What are the three principal types of blood cells? Erythrocytes = red blood cells
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This note was uploaded on 04/18/2008 for the course BIOLOGY 101 taught by Professor Erickson during the Spring '08 term at Louisiana State University in Shreveport.

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BIOS_101_Review_-_Exam_2 - BIOS 101 Review Exam 3 The exam...

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